[generic] RPG a day lockdown #64 - what makes fantasy special?

My favourite bit of anachronism comes from an episode of Blake's 7.

Blake: Do you have a computer on this base, commander?
Base commander: [Proudly] We have two!
I am literally just listening to an Asimov audio book where the protagonist has just been woken up by his visiphone. Somewhere in the room an atom counter is ticking down. So he puts on his slippers......